When comparing The Cave vs Assassin's Creed Unity, the Slant community recommends The Cave for most people. In the question“What are the best co-op games on Steam?”The Cave is ranked 38th while Assassin's Creed Unity is ranked 94th. The most important reason people chose The Cave is:

The Cave has a good sense of humor within, something expected when considering the game was created by the same people as The Secret of Monkey Island.

Pros

Pro

Cheesy jokes of the best kind

The Cave has a good sense of humor within, something expected when considering the game was created by the same people as The Secret of Monkey Island.

Pro

3 player local co-op

The Cave supports up to 3 player local co-op play. Sadly there is no online co-op.

Pro

Characters based on 7 deadly sins

Each character represents one of the seven deadly sins making the game a bit of a moral tale.

Pro

Crouch walk finally implemented

Assassin's Creed Unity has finally added in a method for players to crouch-walk. Allowing them to remain hidden going from cover to cover. This was an often asked for mechanic and is now finally implemented into the game series.

Pro

Wide range of customization

From different weapon slots to changing outfit pieces independently there are quite a lot of customization options to utilize which allows for the player to feel that there character is individualized.

Pro

4 player online co-op

Assassin's Creed Unity features up to four player online co-op.

Cons

Con

Tedious level design

There is a lot of backtracking and lever pulling that gives a feeling of lazy level design to elongate the game.

Con

Co-op may leave one or two players out on certain stages

Some stages do not offer gameplay for all co-op players. Although the co-op is drop in drop out, certain points of the game do not offer anything for the other players to do.

Con

Buggy

Has more bugs than an ant hill

Con

More of the same

Like most of Ubisoft's cookie cutter games, the gameplay of Assassin's Creed Unity is just more of the same from previous titles with little implemented to set it apart from any other in the series.